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Excel in math and science

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It's hard to learn from lectures and videos

Learn more effectively through short, interactive explorations.

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Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, interactive explorations.

Used and loved by over 7 million people

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.

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That seems reasonable. Find out if you're right!

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Chess

Intro

Concept Quizzes

Beginner Chess Warmup
Rooks Warmup
Rook Synergy
Castling
Rook Tactics
Basic Rook Endgames
Rook Endgames
Restricted King Movement Warmup

Challenge Quizzes

Level 2 Tactical
Level 3 Tactical
Level 4 Tactical
Level 2 Abstract
Level 3 Abstract

Basic Rook Endgames

Black to move and mate with Ra1#. The White king is not shown. Which of these squares could it be placed?

c1 d1 e1 All of the above

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by Brilliant Staff

White to move. Given optimal play, the situation is a

Win for White Win for Black Draw

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by Brilliant Staff

Black to move. Given optimal play, the situation is a

Win for White Win for Black Draw

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by Brilliant Staff

White to move. What's the best play?

Rg4 Re2 Rh2+ Kf7

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by Brilliant Staff

Black to move. The position is

A win for White A win for Black A draw

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by Brilliant Staff

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